Ever since I was a child, I wanted to know what it would be like to be different, and I can remember being quote taken with the book "Black Like Me." That was back when blacks were still maligned in society, something that still exists today but is rapidly changing.
So, when I decided I would make another stab at trying to be a Baha'i and trying to make peace with God, and I first came to forums, after about a year on Planet Baha'i I decided to branch out, because I had not been into religion for most of my life and I did not know anything about Christianity or any other religions. So I spent some time on a Christian forum where I learned what NT and OT stood for. People still do not believe that I had not read one page of the Bible before I was 60 years old; i simply had no interest.
Then after a while on the Christian forum I decided to go to a forum that was comprised mostly of atheists because I wanted to know what atheists were like, and that became my primary forum for about three years. When I fist showed up I had the impression that all atheists were hedonist, but it did not take long before I realized I was dead wrong, and that most atheists care about social, political, and environmental issues, and they care about the state of the world, much more so than most believers, who believe that God has their backs. One of my first threads on that forum was entitled "Belief does not make you a good person."
But the point I wanted to make is that believers who do not even bother to get to know atheists and associate with them on a personal level as I did, making them my friends, will make assumptions about atheists and base their opinions upon what their scriptures say about nonbelievers. I find this rather sad, but if believers have no occasion to associate with nonbelievers, because they are so cloistered away with other believers, then they will never know what they are like.
Sadly, I think this applies to many Baha'is, not just to Christians and Muslims. I think that part of the reason for this lack of association is that on some level, perhaps subconscious, many believers cannot respond to the legitimate complaints that atheists have about God, so some believers just double down and attack atheists in self defense. Of course this is just my opinion, given psychology is my background and training.